CFLib.org – Common Function Library Project

Description:
Check if two dates refer to the same month. This is different from using the built-in function DateDiff("m") as it will only count whole months difference, whereas a difference of just a second could be the difference between one month and another.

Return Values:
Returns a boolean.

Example:

<cfoutput>
DifferentMonth test:
#DifferentMonth("{ts '2002-12-31 23:59:59'}","{ts '2003-01-01 00:00:00'}")#<br>
Compare to DateDiff: 
#DateDiff("m","{ts '2002-12-31 23:59:59'}","{ts '2003-01-01 00:00:00'}")#<br>
</cfoutput>

Parameters:

Full UDF Source:

/**
 * Check if two dates refer to the same month.
 * 
 * @param date1      First date to check. 
 * @param date2      Second date to check. 
 * @return Returns a boolean. 
 * @author Matthew Walker (matthew@cabbagetree.co.nz) 
 * @version 1, March 21, 2002 
 */
function DifferentMonth(date1, date2) {
    return ( ( Month(date1) NEQ Month(date2) ) OR ( Year(date1) NEQ Year(date2) ) );
}